I think it’s 27 3/4 since you just had the 21 and 6 together and it should be the same fraction
Answer:
![a {}^{2} - 2ab + b {}^{2}](https://tex.z-dn.net/?f=a%20%7B%7D%5E%7B2%7D%20%20-%202ab%20%2B%20b%20%7B%7D%5E%7B2%7D%20)
Step-by-step explanation:
![(a - b) (a - b) \\ a {}^{2} - ab - ba + b {}^{2} \\ a {}^{2} - 2ab + b {}^{2}](https://tex.z-dn.net/?f=%28a%20-%20b%29%20%28a%20-%20b%29%20%20%5C%5C%20a%20%7B%7D%5E%7B2%7D%20%20-%20ab%20-%20ba%20%20%2B%20b%20%7B%7D%5E%7B2%7D%20%20%5C%5C%20a%20%7B%7D%5E%7B2%7D%20%20-%202ab%20%2B%20b%20%7B%7D%5E%7B2%7D%20)
Using proportions, it is found that Demarco needs 4 tiles.
----------------------
- This question is solved by proportions, using a rule of three.
- Each tile uses 1/2 = 0.5 ft.
- In total, he needs 2 ft.
Thus, the<u> rule of three</u> is given by:
1 tile - 0.5 ft
x tiles - 2 ft
Applying cross multiplication:
![0.5x = 2](https://tex.z-dn.net/?f=0.5x%20%3D%202)
![x = \frac{2}{0.5}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B2%7D%7B0.5%7D)
![x = 4](https://tex.z-dn.net/?f=x%20%3D%204)
Thus, Demarco needs 4 tiles.
A similar problem is given at brainly.com/question/23536327
Answer:
If the lines area parallel: x = 69 degrees
Step-by-step explanation: